If you are a language designer (or fan!) and would like BBEdit customers to be able to utilize BBEdit’s syntax coloring, language-aware folding, function navigation, and completion services while editing source files written in your language, we encourage you to include a language module with your product.
The simplest path is to write a codeless language module.
Reference information for doing so is available here.

Language module development information is available in the BBEdit SDK,
which may be downloaded here.

The one you're talking is a codeless language module, mine is a code language module, using the SDK.